4/16/2009STScI-2009-1783.Galaxy Cluster MACS J0717
The most crowded collision of galaxy clusters has been identified by combining information from three different telescopes. This result gives scientists a chance to learn what happens... (More)

3/3/2009STScI-2009-1087.Trio of Galaxies Mix It Up
Though they are the largest and most widely scattered objects in the universe, galaxies do go bump in the night. The Hubble Space Telescope has photographed many pairs of galaxies... (More)